SQL Server DBA日常查询视图_数据库性能视图

1.获取有关按平均CPU 时间排在最前面的五个查询的信息

SELECT TOP 5 total_worker_time/execution_count AS [Avg CPU Time],
     SUBSTRING(st.text, (qs.statement_start_offset/2)+1, 
         ((CASE qs.statement_end_offset
           WHEN -1 THEN DATALENGTH(st.text)
          ELSE qs.statement_end_offset
          END - qs.statement_start_offset)/2) + 1) AS statement_text
 FROM sys.dm_exec_query_stats AS qs
 CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) AS st
 ORDER BY total_worker_time/execution_count DESC;

1.获取有关按平均CPU 时间排在最前面的五个查询的信息